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A166 User's Guide

A166 Introduction Assembling Programs Operands and Expressions Operators Control Statements Macro Processor Error Messages Fatal Errors Actions Messages Non-Fatal Errors Reference Error A1 Error A2 Error A3 Error A4 Error A5 Error A6 Error A7 Error A8 Error A9 Error A10 Error A11 Error A12 Error A13 Error A14 Error A15 Error A16 Error A17 Error A18 Error A19 Error A20 Error A21 Error A22 Error A23 Error A24 Error A25 Error A26 Error A27 Error A28 Error A29 Error A30 Error A31 Error A32 Error A33 Error A34 Error A35 Error A36 Error A37 Error A38 Error A39 Error A40 Error A41 Error A42 Error A43 Error A44 Error A45 Error A46 Error A47 Error A48 Error A49 Error A50 Error A51 Error A52 Error A53 Error A54 Error A55 Error A56 Error A57 Error A58 Error A59 Error A60 Error A61 Error A62 Error A63 Error A64 Error A65 Error A66 Error A67 Error A68 Error A69 Error A70 Error A71 Error A72 Error A73 Error A74 Error A75 Error A76 Error A77 Error A78 Error A79 Error A80 Error A81 Error A82 Error A83 Error A84 Error A85 Error A86 Error A87 Error A88 Error A89 Error A90 Error A91 Error A92 Error A93 Error A94 Error A95 Error A96 Error A97 Error A98 Error A99 Error A100 Error A101 Error A102 Error A103 Error A104 Error A105 Error A106 Error A107 Error A108 Error A109 Error A110 Error A111 Error A112 Error A113 Error A114 Error A115 Error A116 Error A117 Error A118 Error A119 Error A120 Error A121 Error A122 Error A123 Error A124 Error A125 Error A126 Error A130 Error A132 Error A133 Error A134 Error A135 Error A136 Error A137 Error A150 Error A151 Error A152 Error A153 Error A154 Error A155 Error A156 Error A157 Error A158 Error A159 Error A160 Error A161 Error A162 Error A163 Error A164 Error A165 Error A166 Error A167 Error A168 Error A169 Error A170 Error A171 Error A172 Appendix

Error Messages

Errors recognized by the A166 Assembler are output to the listing file or displayed on the screen. Two classes of errors exist: Fatal Errors and Non-Fatal Errors.

  • Fatal Errors indicate an unrecoverable problem and cause the assembler to halt immediately. The error message is displayed on the screen. Fatal errors are usually caused by a disk problem or file-access problem.
  • Non-Fatal Errors do not halt the assembler but may indicate a problem that prevents correct or valid assembler output. Non-fatal errors are typically caused by syntax or semantic errors in the source file.


  • A program that assembles with no errors is not necessarily bug-free. No assembler can confirm correct or intended operation of your source code. That task is ultimately the sole responsibility of the software developer.
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